Jefferies Group Inc., which said last year it wanted to be among the top five brokers on the London Metal Exchange, stopped trading on the floor of the world’s biggest industrial-metals marketplace after 14 months.

Jefferies Group Inc. agreed to be acquired by its biggest shareholder, Leucadia National Corp., in a $2.8 billion deal the companies said would make the investment bank better able to weather market turmoil.

Jefferies Group Inc., the investment bank that helped rescue Knight Capital Group Inc., dropped the most in eight months in New York trading after reporting earnings that fell short of analysts’ estimates excluding gains from the deal.